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Cartridge / Membrane Installation
Your Thermo Scientific TII has been shipped with one RO membrane for the 12 lph unit, or two RO
membranes for the 24 lph unit, which you will install. The Startup Kit (D502138) includes a prefilter,
MPS cartridge, carbon filter, and cartridge pack, and must be purchased separately. To prepare your
Thermo Scientific TII for operation, disconnect the unit from the power supply if connected.
Figure 3-11 Cartridge Installation: (left to right) prefilter, MPS, carbon
Particulates can damage your membranes, resulting in premature membrane failure. Therefore, your
Thermo Scientific TII uses a prefilter to remove particulates from your feed water. Install the prefilter
as follows:
1. Open the front left door.
2. Remove the prefilter (Part Number D502113) from its packaging and wet the o-rings with water.
3. Insert the prefilter upright into the left position upper and lower quick disconnects and push until
firmly connected. For easier installation, connect bottom first.
MPS Cartridge Installation
The MPS cartridge contains a slow dissolving anti-scalant material. The anti-scalant material combines
with water to prevent scale buildup on the membrane surface. Install the MPS cartridge as follows:
1. Remove the MPS cartridge (Part Number D502114) from its packaging and wet the o-rings with
water.
2. Insert the MPS cartridge upright into the middle position upper and lower quick disconnects and
push until firmly connected. For easier installation, connect bottom first.
Thermo Scientific
Note The cartridges must be installed in the correct order to operate properly.
Installation
MPS Cartridge Installation
TII Water System
3-7
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